Year	years
1960	54.995
1961	55.538
1962	56.052
1963	56.538
1964	56.96
1965	57.319
1966	57.6
1967	57.876
1968	58.16
1969	58.337
1970	58.854
1971	59.356
1972	59.956
1973	60.627
1974	61.364
1975	62.116
1976	62.831
1977	63.562
1978	64.22
1979	64.825
1980	65.38
1981	65.902
1982	66.402
1983	66.879
1984	67.605
1985	68.341
1986	69.187
1987	70.098
1988	71
1989	71.825
1990	72.512
1991	72.822
1992	73.334
1993	73.533
1994	73.954
1995	74.228
1996	74.541
1997	74.857
1998	75.209
1999	75.618
2000	75.964
2001	76.329
2002	76.663
2003	76.997
2004	77.285
2005	77.534
2006	77.747
2007	77.947
2008	78.116
2009	78.308
2010	78.488
2011	78.675
2012	78.842
2013	78.997
2014	79.124
2015	79.209
2016	79.137
2017	79.395
2018	79.604
2019	79.953
2020	76.056
2021	77.462
2022	80.481